4.x Features Removed

Data Layer Differences

Version 5.x currently uses a subset of the data layer variables available from the 4.x libraries. All the previous variables, however, can be left in your Data Layer as future 5.x optional classes and updates will make use of them.

API Differences

Version 5.x uses a completely different set of APIs to set it apart from version 4.x. The two main differences are: